Combination lock



' 1622 March 29,1921. OBERG ,605

COMBINATION LOCK Ori in l Filed Oct. 18. 1923 Wi/ncsses: I [ave/ lan-Patented Mar. 29, 1927.

UNITED STATES 1,622,605 PATENT OFFICE.

KNUT HELMER onnne, or Nansen, BRITISH COLUMBIA, CANADA.

COMBINATION LOCK.

Application filed October 18, 1923, Serial Ne; 669,271. ,Renewed July18, 1925.

This inventionrelates to improvements in combination locks and itsobject is to provide a simple practical device of this type capable of avariety of uses, With the it"oregoing and other objects in view themvention consists in the combination and arrangement of parts to behereinafter fully described, pointed out in the appended claims andillustrated in the accompanying drawing which forms a part of thisapplication and in whic'h Fig. 1 is a face view of the lock.

Fig. 2 is a fragmentary view, the dials being removed.

Fig. 3 is a fragmentary rear view disclosing the mechanism for actuatingthe bolt.

Fig. 1 is a fragmentary view of the boltreceiving casing.

Like reference characters denote corresponding parts throughout theseveral views.

The reference numerals 1, 2 denote the annular frame members betweenwhich is secured the annular rack 3 to which the ends of the span bar 4are secured which supports the spindle 5 whereon the rotary circularrack 6 is arranged, said rack being formed with a recess 7 and being inthe plane of the rack 3 but spaced away therefrom to receive the pinion8 that is in mesh with both racks 3 and 6, said pinion being arrangedupon the shaft 9 that is disposed between the members 3 and 6 and thatextends outwardly through a slot 10 in the frame member 1 and isprovided with the knob 11 whereby it is rotated to cause rotation of thesaid pinion. By rotation of the knob 11 the shaft 9 is rotated togetherwith its pinion 8 which rotates the rack 6.

A link 12 is formed with a perforation in one end to snugly receive theshaft 9 which passes therethrough, rotation of the shaft 9 servingyieldingly to swing the link 12 about it as a pivot. The opposite end ofthe said. link, however, is pivotally secured to the bolt 13 formed withan elongated slot 1 1 through which the spindle 5 passes, said bolt 13and link 12 being disposed upon the same side of the rack 6 as the spanbar 1. The bolt 13 is pivotally and slidably supported upon the saidspindle 5 and said bolt is provided with a lug 15 which in the extendedposition of the bolt 13, shown in Fig. 3, is disposed between the racks3 and 6. When the shaft 9 is rotated the rack 6 is rotated, the lug 15riding over the teeth of said rack until the recess 7 aligning with thesaid lug receives the same and permits the link 12 to retract the bolt13. In locked position the bolt 13 extends beyond the periphery of theframe members 1, 2 into the bolt casing 16.

Three links 17,- 18 and 19 pivotally carried by the frame member 1 areadapted. for releasable engagement, by means of thumb-screws (not shown)extending through the perforations 20in their ends, for engagementrespectively with the rotary dials 21, 22, 23 to retain them in adjustedposition relatively. When one dial is positioned, as dial 21, the link17 is then engaged with it temporarily so that it will not be moved byfriction of the spindle 5 while dial 22 is being set. Dial 22 is held inadjusted position by link 18 while dial 23 is being set. Each of saiddials is centered upon the spindle 5 loosely and is formed withgraduations 24. Each dial 22, 23 is provided with an indicator 25 andthe frame member 1 with a similar indicator 25, the indicator 25 of dial22 working in connection with the graduations 24 of dial 21; theindicator of dial 23 referring to the graduations of dial 22 and theindicator of frame member 1 pointing to the graduations of the dial 23.Each dial, further, is provided with a knob 26 whereby it is rotated.The three dials are, however, but blinds or idlers to camouflage thereal mechanism. The operator may position the dials relatively to suithis fancy by means of the knobs 26 but when he wishes to unlock thedevice he rotates the knob 11 and s0 turns the disc 6 until its recess 7will receive the lug 15. In the extreme inner or retracted position ofthe bolt 13, with the lug 15 at the inner termination of the recess 7,the device is unlocked and the bolt 13 withdrawn from the casing 16.Rotation of the knob in the opposite direction will force the boltoutwardly thus locking the device.

What is claimed is:

1. In a look, a casing, a rack carried thereby, a span bar carried bysaid rack, a spindle carried by said span bar, a rotary rack centeredupon said spindle within the first rack .and formed with a peripheralrecess, a bolt pivotally and slidably carried by said spindle, a lugcarried by said bolt for disposal between said racks and capable of,disposal in the said recess, means connecting said racks and said boltwhereby the latter is actuated, and a casing for said bolt.

2. In a lock, a casing, a rack carried thereby, a span bar carried bysaid rack, a spindle carried by said span bar, a rotary rack centeredupon said spindle within the first nalned rack and formed with aperipheral recess, a bolt pivotally and slidably carried by saidspindle, a pinion connecting the aforesaid racks, a shaft carrying saidpinion, connection between said shaft and bolt, a lug carried by saidbolt for disposal in the said recess in said rotary rack, and a casingfor said bolt.

3. In a look, a casing, a stationary rack carried thereby, a span barcarried by said stationary rack, a spindle carried by said span bar, arotary recessed rack arranged upon said spindle and spaced away from thestationary rack, a bolt arranged upon said spindle, a lug carried bysaid bolt capable of disposition in the recess of said stationary rack,means connecting said racks and bolt whereby said rotary rack and boltmay be actuated and caused to cooperate with each other, and a casingfor said bolt.

4. In a lock, a casing, a stationary rack carried thereby .a span barcarried by said stationary rack, a spindle carried by said span bar, arotary recessed rack arranged upon said spindle and spaced away from thestationary rack, a bolt arranged upon said spindle, a lug carried bysaid bolt for movement into and out of the recess in said rotary rack,means connecting said racks and bolt whereby said rotary rack and boltmay be actuated, graduated dials arranged upon said spindle forcooperation with each other, and a casing for said bolt In testimonythat I claim the foregoing as my own I have hereto aiiiXed my signature.

KNUT HELMER OBERG.

